L4.14.98_2.3.0 using by i.MX 8QXP b0

[carolyn_zhang]

Hi,

I had compiled L4.14.98_2.3.0 for MCIM8QXP MEK, which i.MX 8QXP b0 is used, according to AN12770.pdf. However, I got error as below:

   [    3.235767] tcpci 20-0050: Failed to request reset gpio.
   [    3.258801] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
   [    3.265452] [drm] No driver support for vblank timestamp query.
   [    3.271501] imx-drm display-subsystem: bound imx-drm-dpu-bliteng.2 (ops dpu_bliteng_ops)
   [    3.279958] imx-drm display-subsystem: bound imx-dpu-crtc.0 (ops dpu_crtc_ops)
   [    3.287780] imx-drm display-subsystem: bound imx-dpu-crtc.1 (ops dpu_crtc_ops)
   [    3.295145] imx-drm display-subsystem: failed to bind ldb@562210e0 (ops imx_ldb_ops): -517
   [    3.303705] imx-drm display-subsystem: master bind failed: -517

The serial port printed the error in a loop.

Does L4.14.98_2.3.0 support i.MX 8QXP b0? Could some one give me some advices? Thanks.

[carolyn_zhang]

Hi,

I have solved this question. However, I don't know why.

Before compiled, I added my own driver ds90ub.c in kernel.

• First method, which caused the error.

       I put ds90ub.c in drivers/media/i2c, and modified files (drivers/media/Kconfig, drivers/media/i2c/Kconfig, and drivers/media/i2c/Makefile), then I received the error, and could not boot the MEK board. However,  this is the same way as I did in L4.14.98_2.0.0, and it is ok in L4.14.98_2.0.0. I don't know why it could not be used on L4.14.98_2.3.0.

• Second method, which was ok.

       I put the same file ds90ub.c in drives/media/platform/imx8, and modified files (drives/media/platform/imx8/Kconfig and drives/media/platform/imx8/Makefile), then I can boot the filesystem on MCIM8QXP MEK.

Could some one give me some advices about the error? Thanks.

[joanxie]

yes,4.14.98_2.3.0 supports this, did you test demo images or images built by yourself? you can refer to the known issues of imx8qxp on 4.14.98_2.3.0 from the enclosed file

[karangajjar]

Hi Carolyn Zhang,

Can you please let us know how are you booting the i.MX8QXP MEK? Like from SD or from eMMC?

Have you follow the i.MX Linux User Guide from the https://www.nxp.com/webapp/Download?colCode=L4.14.98_2.3.0_LINUX_DOCS&location=null on flashing the eMMC and bootloader?

Regards,

Karan Gajjar